| 1st | 90 | Stommelen / Schurti / Barbour | Porsche 935/77A | Dick Barbour Performance | 1:53.611 |
| 2nd | 30 | Hezemans / Fitzpatrick / Gregg | Porsche 935/77A | GeLo Racing | 1:54.437 |
| 3rd | 0 | Ongais / Field | Porsche 935/77A | Interscope Racing | 1:54.682 |
| 4th | 1 | Follmer / Ickx | Porsche 935 | Vasek Polak Racing | 1:54.862 |
| 5th | 2 | Hobbs / *Peterson | BMW 320i Turbo | McLaren North America | 1:55.057 |
| 6th | 08 | Haywood / Paul | Porsche 935/77A | JLP Racing | 1:55.341 |
| 7th | 3 | Guthrie / Redman / Haywood / *Follmer | Porsche 935 | Vasek Polak Racing | 1:57.057 |
| 8th | 13 | Shaw, Jr. / Shelton | Porsche 935 | Hal Shaw Racing | 1:58.289 |
| 9th | 94 | Whittington / Whittington | Porsche 935/77A | Whittington Borthers | 1:58.605 |
| 10th | 19 | Cord / Adams | Chevrolet Monza 350 | Chris Cord Racing | 1:58.651 |
| 11th | 6 | Pickett / Gloy | Chevrolet Corvette 427 | Pickett Racing | 1:58.846 |
| 12th | 7 | Heimrath / Miller | Porsche 935 | Heimrath Racing | 2:00.147 |
| 13th | 10 | Stuck / Quester | BMW 320i | BMW Faltz Essen | 2:01.904 |
| 14th | 20 | Grohs / Höttinger | BMW 320i | BMW Faltz Essen | 2:02.049 |
| 15th | 71 | Thomas / Chandler | Porsche 935 | Otis Chandler | 2:02.203 |
| 16th | 11 | Heinz / Forbes-Robinson / *McClain | Chevrolet Monza 350 | Budweiser Racing Team | 2:03.330 |
| 17th | 4 | Haywood / Gunn / *Guthrie / *Follmer / *Ickx | Porsche 935 | Vasek Polak Racing | 2:04.694 |
| 18th | 57 | Frostrom / Wood | Porsche Carrera RSR | Robert Frostrom Racing | 2:06.002 |
| 19th | 75 | Ridgely / Cook | Porsche Carrera RSR | Norman Ridgely | 2:06.686 |
| 20th | 44 | Fuerstenau / Tullius | Jaguar XJS | Group 44 | 2:06.817 |
| 21st | 24 | Frank / Leven | Porsche Carrera RSR | Executive Industries | 2:07.535 |
| 22nd | 80 | Engels / *Nagel | Chevrolet Corvette 454 | Nagel Racing Enterprises | 2:07.975 |
| 23rd | 9 | Huber / Headley | Chevrolet Corvette 427 | Apple Valley Racing | 2:08.955 |
| 24th | 81 | Morton / *Bedard | Pontiac Firebird Trans-Am | Adams Associates | 2:09.357 |
| 25th | 98 | Rynone / Oleyar | Chevrolet Corvette 427 | Rynone Industries | 2:09.490 |
| 26th | 43 | Joyce / Bothello | Chevrolet Corvette 427 | Phantom Racing | 2:10.519 |
| 27th | 32 | Griswold / Akin | Porsche Carrera RSR | Earle & Akin Racing Assoc. | 2:11.708 |
| 28th | 97 | Frank / Schramm | Porsche Carrera RSR | Framm Promotions | 2:11.916 |
| 29th | 79 | Callas / Papke | Porsche Carrera RSR | Rennsport Porsche Works | 2:11.945 |
| 30th | 25 | Migault / Guitteny | Ferrari 365 GT4/BB | Grand Competition Cars, Inc. | 2:12.231 |
| 31st | 62 | Thomas / *Johnson | Porsche Carrera RSR | Lancer | 2:12.281 |
| 32nd | 60 | Brandt / Callas | Chevrolet Corvette 350 | John J. Brandt | 2:14.347 |
| 33rd | 17 | Pallavicini / Calderari | Porsche 934 | Pallvano Corse | 2:15.399 |
| 34th | 91 | Roberts / Schulte | Chevrolet Corvette 350 | Tom's Mechanical Emporium | 2:17.562 |
| 35th | 64 | Carter / Baechle | Chevrolet Corvette 427 | Endurance Racing Enterprises, Inc./Auto Parts | 2:17.602 |
| 36th | 88 | Hamilton / Collins / Wade | Porsche 911 S | Hamilton House Racing | 2:17.945 |
| 37th | 74 | Scott / *Honegger / *Weir | Porsche 911 S | Z & W Enterprises | 2:18.365 |
| 38th | 29 | Overbagh / Hagan | Chevrolet Monza 350 | Billy J. Hagan | 2:18.603 |
| 39th | 51 | Aquilante / White / *White / *Wolpert | Chevrolet Corvette 350 | Thomas Aquilante | 2:19.282 |
| 40th | 77 | Jennings / O'Steen | Porsche 911 S | Bruce Jennings | 2:21.487 |
| 41st | 22 | Stephens / *Bergstrom | Porsche Carrera RSR | Jeffrey Stephens | 2:22.164 |
| 42nd | 18 | Kicak / Young | Chevrolet Corvette 360 | Free Spirit Racing | 2:24.723 |
| 43rd | 82 | Solomone / *Lang | Chevrolet Camaro Turbo 302 | Solomone Racing | 2:27.478 |
| 44th | 52 | Slodowick / McCandless | Porsche 914/6 | McCandless Automotive | 2:30.104 |
| 45th | 15 | Mancuso / Coykendall | Chevrolet Greenwood Corvette 355 | Motion Marketing | 2:32.609 |
| 46th | 53 | Schuler / Schuler | Datsun 280Z | Fred Schuler | 2:32.936 |
| 47th | 69 | Fiscus / Lancaster | Chevrolet Corvette 350 | Old Gold Racing | 2:37.882 |
| 48th | 16 | Kassel / Franklin | Chevrolet Camaro 302 | Kassel Auto Parts of Syracuse | 2:39.214 |
| 49th | 41 | Arutunoff / Marina | Lancia Stratos | Automotive International | 2:39.674 |
| 50th | 92 | Orr / Jobe / *Miller | Chevrolet Corvette 454 | E. F. Miller & Co. and Sherill ARCO | 2:47.857 |
| 47th | 12 | Peterson / *Hobbs | BMW 320i Turbo | McLaren North America | no time |